Unable to connecte dialup data card

Hello,
hi i have a laptop in my office network i could not access any computer so i did a trick in export the netbt from registry and import it and just reinstall the local area connection in my computer. And the sharing problem is reserved but problem rise with my data card dialup network it is showing connection registrig the compuer one the internet but lasly shows unable to connect error code TCP/IP CP 2. plz help anyboday if u have any suggestion actually it my managers laptop.
I know that problem is rises from there. I have tried reinstalling the modem but still the same problem.
any suggestion would be highly appreciated.
Thanks in advance if anybody can solve this problem